Portal: Revolution gives Portal 2 fans another full campaign inside Aperture Science

You'd think that after everything Aperture Science has put us through, we'd have learned to stay the hell away from its testing facilities. Deadly experiments, collapsing infrastructure, questionable safety standards, and artificial intelligence with a rather disturbing sense of humor. But offer us another room full of portals and physics puzzles, and apparently we're ready to sign the waiver all over again.

Second Face Software's Portal: Revolution gives Portal 2 fans an entirely new campaign set between the events of the first two games. You play a test subject working alongside a personality sphere named Stirling, exploring a decaying Aperture facility while searching for a way to restore its systems. The team has built roughly forty puzzles, mixing familiar mechanics with new test elements and a series of challenges that restrict you to placing blue portals.

And this isn't just a handful of extra chambers somebody threw together over a weekend. There's a proper story, new environments, and plenty of opportunities to spend twenty minutes staring at a wall before realizing the solution was right in front of you the entire time.

It's free for players who own Portal 2 on Steam, with Windows and Linux support, although this is a single-player adventure rather than a co-op campaign.

If you've been missing that particular feeling of being simultaneously brilliant and completely clueless inside an Aperture test chamber, Portal: Revolution has plenty more opportunities to experience both. Just don't expect anybody at Aperture to congratulate you for surviving.